TW283775B - Linear prediction coefficient based inverse spectrum coefficient generator - Google Patents

Abstract

A linear prediction coefficient based inverse spectrum coefficient generator, which processes linear prediction coefficient according to one inverse spectrum coefficient equation, comprises: first memory unit for continuously storing the linear prediction coefficient; second memory unit for continuously storing inverse spectrum coefficient which will be generated; third memory unit for continuously storing several constants; one control module electrically connected to the first, second and third memory unit, in which the control module could operate to control the first memory unit to output one of the linear prediction coefficients, and to control the second memory unit to output one of the inverse spectrum coefficient, and control the third memory unit to output one of the constants; one multiplier electrically connected to the first, second and third memory unit, in which the multiplier generates one of the choices in the linear prediction coefficient, one of the choices in the inverse spectrum coefficients and one of the choices in the constants; one adder which has one first data input device for receiving the another one in the linear prediction coefficients, second data input device for receiving product generated from the multiplier, and one output end electrically connected to the second memory unit, in which the adder generates the sum of product from the multiplier and another one in the linear prediction coefficients from the first memory unit on the output end of the adder, and getting the inverse spectrum coefficient form the output end of the adder; the control module controls the second memory unit to continuously store the inverse spectrum coefficient from the adder.